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dc.contributor.authorRiikilä, Timo
dc.date.accessioned2012-11-22T11:13:21Z
dc.date.available2012-11-22T11:13:21Z
dc.date.issued2012
dc.identifier.otheroai:jykdok.linneanet.fi:1238402
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/40411
dc.description.abstractIn this thesis the basic properties of the lattice- Boltzmann method (LBM) are introduced. Also, a particle model used in combination with LBM is presented, and the combined model is then applied to ink propagation in samples of paper. Simulation geometries were acquired with two different methods, namely confocal microscopy and X-ray tomography. The effect of simulation parameters and paper properties on ink propagation was considered. Promising results were acquired with both image acquiring techniques, but for a better consistency between simulations and experiments the methods should be combined so as to get images that include the full thickness of the sample together with the ink distribution. Adjustment of simulation parameters in confocal microscopy geometries showed that diffusion coefficient was the main parameter that explained the form of the ink distribution curves. This suggests an intuitively expected result: ink tends to move with the major flow channels unless diffusion is strong enough to separate enough of ink particles from the flow. Simulations done in samples of varying sizing gave incoherent results. One simulation series was in agreement with experimental results, while another was not. Possible explanations to this dilemma includes effects of paper heterogeneity on the results, differencies in paper properties in macroscopically different parts of the paper, and chemical effects not taken into consideration in the model. We can conclude however that simulations with the methods applied here qualitatively capture the main features of the settling in paper. In part this conclusion is based in the fact that the experimentally observed division into two separate components in the distribution of attached ink pigments was also realised in the simulations.
dc.format.extent54 s
dc.language.isoeng
dc.rightsThis publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.en
dc.rightsJulkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty.fi
dc.subject.otherlattice-Boltzmann
dc.titleApplication of the lattice-Boltzmann method for simulating attachment of ink particles in paper
dc.identifier.urnURN:NBN:fi:jyu-201211223057
dc.type.dcmitypeTexten
dc.type.ontasotPro gradufi
dc.type.ontasotMaster's thesisen
dc.contributor.tiedekuntaMatemaattis-luonnontieteellinen tiedekuntafi
dc.contributor.tiedekuntaFaculty of Sciencesen
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.yliopistoUniversity of Jyväskyläen
dc.contributor.yliopistoJyväskylän yliopistofi
dc.contributor.oppiaineSoveltava fysiikkafi
dc.contributor.oppiaineApplied Physicsen
dc.date.updated2012-11-22T11:13:21Z
dc.rights.accesslevelopenAccessfi
dc.contributor.oppiainekoodi4023
dc.subject.ysopainovärit
dc.subject.ysopaperi


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